Question

resolva a equação 3(5-×)-3(1-2×)=42

Answer 1

3(5-x)-3(1-2x)=42
15-3x-3+6x=42
15+3x-3=42
12+3x=42
3x=42-12
3x=30
x=$\frac{30}{3}$
x=10